From: Colin Ian King
From: Colin Ian King
This was originally mistakenly submitted to net-next. Resubmitting to net.
The comparison of numvecs < 0 is always false because numvecs is a u32
and hence the error return from a failed call to pci_alloc_irq_vectores
is never detected. Fix this by using the signed int ret to handle the
error return and assign numvecs to err.
Detected by CoverityScan, CID#1468650 ("Unsigned compared against 0")
Fixes: a09bd81b5413 ("net: aquantia: Limit number of vectors to actually
allocated irqs")
Signed-off-by: Colin Ian King
Signed-off-by: Igor Russkikh
---
drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c | 11 +--
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
index a50e08bb4748..750007513f9d 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
@@ -267,14 +267,13 @@ static int aq_pci_probe(struct pci_dev *pdev,
numvecs = min(numvecs, num_online_cpus());
/*enable interrupts */
#if !AQ_CFG_FORCE_LEGACY_INT
- numvecs = pci_alloc_irq_vectors(self->pdev, 1, numvecs,
- PCI_IRQ_MSIX | PCI_IRQ_MSI |
- PCI_IRQ_LEGACY);
+ err = pci_alloc_irq_vectors(self->pdev, 1, numvecs,
+ PCI_IRQ_MSIX | PCI_IRQ_MSI |
+ PCI_IRQ_LEGACY);
- if (numvecs < 0) {
- err = numvecs;
+ if (err < 0)
goto err_hwinit;
- }
+ numvecs = err;
#endif
self->irqvecs = numvecs;
--
2.17.1
